Show per-file captions

movmaker.py

@@ -19,6 +19,7 @@ import shlex
 import subprocess
 import sys
 import tempfile
+import unicodedata
 from dataclasses import dataclass
 from datetime import datetime
 from pathlib import Path
@@ -208,6 +209,14 @@ def media_date(path: Path) -> datetime:
 
 
 def slugify(value: str) -> str:
+    replacements = {
+        "æ": "ae", "Æ": "ae",
+        "ø": "o", "Ø": "o",
+        "å": "a", "Å": "a",
+        "đ": "d", "Đ": "d",
+    }
+    value = "".join(replacements.get(ch, ch) for ch in value)
+    value = unicodedata.normalize("NFKD", value).encode("ascii", "ignore").decode("ascii")
     value = value.strip().lower()
     value = re.sub(r"[^a-z0-9]+", "_", value)
     value = value.strip("_")
@@ -348,6 +357,7 @@ def build_video(
     audio: Path | None,
     output: Path,
     data: MovieData,
+    captions: list[str],
     fade: float,
     audio_fade: float,
     width: int,
@@ -368,16 +378,19 @@ def build_video(
     n = len(clips)
 
     total_duration = durations[0]
+    transition_offsets: list[float] = []
     if n == 1:
         current = "0:v"
     else:
         current = "v01"
         offset = max(0.0, durations[0] - fade)
+        transition_offsets.append(offset)
         filters.append(f"[0:v][1:v]xfade=transition=fade:duration={fade:.3f}:offset={offset:.3f}[{current}]")
         total_duration = durations[0] + durations[1] - fade
         for i in range(2, n):
             next_label = f"v{i:02d}"
             offset = max(0.0, total_duration - fade)
+            transition_offsets.append(offset)
             filters.append(f"[{current}][{i}:v]xfade=transition=fade:duration={fade:.3f}:offset={offset:.3f}[{next_label}]")
             current = next_label
             total_duration += durations[i] - fade
@@ -388,8 +401,8 @@ def build_video(
     title_font = str(Path.home() / ".local/share/fonts/google/BebasNeue-Regular.ttf")
     stamp_font = str(Path.home() / ".local/share/fonts/google/Inter%5Bopsz,wght%5D.ttf")
     if title_lines:
-        title_font_size = max(50, height // 12)
+        title_font_size = max(60, height // 10)
-        subtitle_font_size = max(28, height // 24)
+        subtitle_font_size = max(34, height // 20)
         main_title = data.title or title_lines[0]
         subtitle = " | ".join(x for x in [data.date, data.place] if x)
         title_alpha = "if(lt(t\\,5)\\,1\\,if(lt(t\\,6)\\,6-t\\,0))"
@@ -397,47 +410,74 @@ def build_video(
             title_y = f"(h-text_h)/2-{title_font_size // 2}"
             filters.append(
                 f"[{current}]drawtext=fontfile='{title_font}':text='{drawtext_escape(main_title)}':x=(w-text_w)/2:y={title_y}:"
-                f"fontsize={title_font_size}:text_spacing=4:fontcolor=white:borderw=3:bordercolor=black:"
+                f"fontsize={title_font_size}:fontcolor=white:borderw=0:shadowcolor=black@0.75:shadowx=3:shadowy=3:"
                 f"alpha='{title_alpha}':enable='between(t,0,6)'[title0]"
             )
             filters.append(
                 f"[title0]drawtext=fontfile='{title_font}':text='{drawtext_escape(main_title)}':x=(w-text_w)/2+1:y={title_y}:"
-                f"fontsize={title_font_size}:text_spacing=4:fontcolor=white:borderw=3:bordercolor=black:"
+                f"fontsize={title_font_size}:fontcolor=white:borderw=0:shadowcolor=black@0.75:shadowx=3:shadowy=3:"
                 f"alpha='{title_alpha}':enable='between(t,0,6)'[title0b]"
             )
             filters.append(
                 f"[title0b]drawtext=fontfile='{title_font}':text='{drawtext_escape(subtitle)}':x=(w-text_w)/2:y=(h-text_h)/2+{subtitle_font_size}:"
-                f"fontsize={subtitle_font_size}:fontcolor=white:borderw=3:bordercolor=black:"
+                f"fontsize={subtitle_font_size}:fontcolor=white:borderw=0:shadowcolor=black@0.75:shadowx=2:shadowy=2:"
                 f"alpha='{title_alpha}':enable='between(t,0,6)'[{title_label}]"
             )
         else:
             filters.append(
                 f"[{current}]drawtext=fontfile='{title_font}':text='{drawtext_escape(main_title)}':x=(w-text_w)/2:y=(h-text_h)/2:"
-                f"fontsize={title_font_size}:text_spacing=4:fontcolor=white:borderw=3:bordercolor=black:"
+                f"fontsize={title_font_size}:fontcolor=white:borderw=0:shadowcolor=black@0.75:shadowx=3:shadowy=3:"
                 f"alpha='{title_alpha}':enable='between(t,0,6)'[title0]"
             )
             filters.append(
                 f"[title0]drawtext=fontfile='{title_font}':text='{drawtext_escape(main_title)}':x=(w-text_w)/2+1:y=(h-text_h)/2:"
-                f"fontsize={title_font_size}:text_spacing=4:fontcolor=white:borderw=3:bordercolor=black:"
+                f"fontsize={title_font_size}:fontcolor=white:borderw=0:shadowcolor=black@0.75:shadowx=3:shadowy=3:"
                 f"alpha='{title_alpha}':enable='between(t,0,6)'[{title_label}]"
             )
     else:
         filters.append(f"[{current}]copy[{title_label}]")
 
-    stamp_size = max(11, height // 80)
+    caption_label = title_label
+    caption_size = max(18, height // 42)
+    for idx, caption in enumerate(captions):
+        if not caption:
+            continue
+        if n == 1:
+            start = 0.0
+            end = total_duration
+        elif idx == 0:
+            start = 0.0
+            end = transition_offsets[0]
+        elif idx == n - 1:
+            start = transition_offsets[idx - 1] + fade
+            end = total_duration
+        else:
+            start = transition_offsets[idx - 1] + fade
+            end = transition_offsets[idx]
+        if end <= start:
+            continue
+        next_label = f"caption{idx}"
+        filters.append(
+            f"[{caption_label}]drawtext=fontfile='{stamp_font}':text='{drawtext_escape(caption)}':x=(w-text_w)/2:y=h-text_h-62:"
+            f"fontsize={caption_size}:fontcolor=white:borderw=1:bordercolor=black:"
+            f"enable='between(t,{start:.3f},{end:.3f})'[{next_label}]"
+        )
+        caption_label = next_label
+
+    stamp_size = max(14, height // 65)
     stamp_lines = [x for x in [data.title, data.date, data.place] if x]
     stamp_text = drawtext_escape(" | ".join(stamp_lines))
     stamp_left_label = "stamp_left"
     if stamp_text:
         filters.append(
-            f"[{title_label}]drawtext=fontfile='{stamp_font}':text='{stamp_text}':x=24:y=h-text_h-18:"
+            f"[{caption_label}]drawtext=fontfile='{stamp_font}':text='{stamp_text}':x=24:y=h-text_h-18:"
-            f"fontsize={stamp_size}:fontcolor=white:borderw=3:bordercolor=black[{stamp_left_label}]"
+            f"fontsize={stamp_size}:fontcolor=white:borderw=1:bordercolor=black[{stamp_left_label}]"
         )
     else:
-        filters.append(f"[{title_label}]copy[{stamp_left_label}]")
+        filters.append(f"[{caption_label}]copy[{stamp_left_label}]")
     filters.append(
         f"[{stamp_left_label}]drawtext=fontfile='{stamp_font}':text='@bubulescu':x=w-text_w-24:y=h-text_h-18:"
-        f"fontsize={stamp_size}:fontcolor=white:borderw=3:bordercolor=black[{final_label}]"
+        f"fontsize={stamp_size}:fontcolor=white:borderw=1:bordercolor=black[{final_label}]"
     )
 
     cmd += ["-filter_complex", ";".join(filters), "-map", f"[{final_label}]"]
@@ -529,8 +569,9 @@ def main(argv: list[str] | None = None) -> int:
         # Use probed normalized duration for accuracy.
         durations = [ffprobe_duration(out) for out in clips]
 
+        captions = [data.captions.get(item.path.name, data.captions.get(str(item.path), "")) for item in media]
         audio = concat_or_mix_audio(audio_files, tmp / "music.m4a")
-        build_video(clips, durations, audio, output, data, fade, audio_fade, width, height, fps, preset, crf)
+        build_video(clips, durations, audio, output, data, captions, fade, audio_fade, width, height, fps, preset, crf)
 
     print(f"Done: {output}")
     return 0